You can't barter round here, they throw you out the yard.
Having said that I have found once you get known it's swings and roundabouts, called in one bay and he had this very nice universal vise mounted on a 4" or so ball, can tilt at any angle and swivel as well. I thought about £40 he wanted £60, so I just paid up and took it home, still worth £60 but would have been better at £40

Later went round and he had a pristine 10" rotary table on the floor, me thinks £70 to £80 and he wanted £20, again paid up and left.
I was there one day and he had this CVA lathe in with all the attachments but a guy was buying it, I was gutted, he wanted £950 for it delivered. Stood there to one side dejected and then this guy said the magic words "I'll give you £850 for it "
Mentally punched the air as I knew it was mine before the guy got the bums rush out the gate. When he's gone I said I'll give you £950 for it Malc. He replied you can have it for £900, I'll deliver it tomorrow drop the money in when you have it.
I have had some real good deals of these guys and never, ever queried a price, if I think it's high I just pay, knowing it will pay back spades.
One day he said look at these , you like these don't you and produced a shoe box with about 25 dial gauges, some with expired dates on stickers, some sticking, some with no glass, most OK. I asked how much, he weighed the box in his hand, said don't weigh anything you cam have them and gave me the box.
John S.